feat(ops): add database backup strategy and log aggregation stack

- Add pg-backup container with daily automated pg_dump (02:00 UTC) and 7-day retention
- Add backup/restore scripts with documented recovery procedure
- Add Loki + Promtail for centralized log aggregation from all Docker containers
- Add Loki as Grafana datasource with correlation ID derived fields
- Add Grafana logs dashboard with volume, error rate, HTTP request, and log viewer panels
- Configure Promtail to parse Pino structured JSON logs with level/context labels
- Enhance LoggerService with string-level formatter and service base field
- Configure 15-day log retention in Loki

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/shared/infrastructure/logger.service.ts

@@ -14,10 +14,14 @@ export class LoggerService implements NestLoggerService {
           ? { target: 'pino-pretty', options: { colorize: true } }
           : undefined,
       formatters: {
+        level(label) {
+          return { level: label };
+        },
         log(object) {
           return maskPii(object) as Record<string, unknown>;
         },
       },
+      base: { service: 'goodgo-api' },
       timestamp: pino.stdTimeFunctions.isoTime,
     });
   }